论文部分内容阅读
采用柠檬酸钠化学还原法制备了尺寸约40nm的Au颗粒,并将纳米Au颗粒组装到磁温敏聚合物Fe3O4@P(NIPAM-AAM)表面,获得了兼具温度响应性、磁响应性和SERS活性的多功能复合材料Fe3O4@P(NIPAM-AAM),Au。用透射电镜(TEM)、红外光谱仪(FT-IR)、振动样品磁强计(VSM)、紫外-可见光谱仪(UV-Vis)等对多功能复合材料进行表征。以罗丹明为探针分子,研究了复合材料的SERS活性。研究表明,多功能复合材料具有良好的超顺磁性和SERS活性,其低临界溶解温度(LCST)在41℃左右。交变磁场作用下,复合材料可在750s内使自身温度升至45℃。
The Au particles with the size of about 40 nm were prepared by the sodium citrate chemical reduction method and the nano-Au particles were assembled on the surface of the magnetic temperature-sensitive polymer Fe3O4 @ P (NIPAM-AAM) SERS activity of multifunctional composite Fe3O4 @ P (NIPAM-AAM), Au. The multi-functional composites were characterized by TEM, FT-IR, VSM and UV-Vis. With rhodamine as a probe molecule, the SERS activity of the composites was studied. Studies have shown that multifunctional composites have good superparamagnetism and SERS activity, and their low critical solution temperature (LCST) is about 41 ℃. Under the action of alternating magnetic field, the composite material can raise its temperature to 45 ℃ within 750s.